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Establishment of mycorrhizal symbiosis inGentiana verna

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Abstract

The last lowland locality ofGentiana verna in the Czech Republic is a calcareous grassland near Rovná at Strakonice in South Bohemia. This locality was the subject of a recovery programme that included support of the remaining population by micropropagation. The plants were inoculated with arbuscular mycorrhizal fungi (AMF) after their transfer toex vitro and the effect of AMF on their establishment and survival was studied. Although the conventional method of inoculation ofG. verna using spores or colonized root segments as an inoculum source resulted in no or negligible root colonization, the transplantation of gentians to the locality Rovná was successful and the plants became colonized with AMF very rapidly in the field. Successful mycorrhization of gentians under experimental conditions occurred only via the extraradical mycelial network established by neighbouring mycorrhizal plant species (nurse plant effect). Different nurse plant species formed different morphological types of mycorrhiza when inoculated with the same fungal isolate. Gentians always had theParis type of root colonization with intracellular hyphal loops and swellings. Intercellular hyphae, arbuscules and vesicles were not observed. No evidence for a positive growth response was found inG. verna.

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Authors and Affiliations

  1. Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43, Průhonice, Czech Republic

    Zuzana Sýkorová, Jana Rydlová & Miroslav Vosátka

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  1. Zuzana Sýkorová
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  2. Jana Rydlová
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  3. Miroslav Vosátka
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Correspondence to Zuzana Sýkorová.

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Sýkorová, Z., Rydlová, J. & Vosátka, M. Establishment of mycorrhizal symbiosis inGentiana verna . Folia Geobot 38, 177–189 (2003). https://doi.org/10.1007/BF02803150

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